Notes

First let me say that if I-80 were the first highway I had to do, I
would never have started this project. This road has more intersections
in the middle of nowhere (thank you IL) and whacky connections with other
roads (including being joined with I-90 for most
of IN and OH) than any 5 other Interstates.

It also has I-180 in Cheyenne, which is an interstate with traffic lights
(thanks to Mark Bozanich for pointing this out to me). I have no idea
what is up with that.

It can be argued that I-80
goes all of the way to the George Washington Bridge, but I think that's
just silly. :)